Duplicity

Duplicity is a browser-based save file editor which performs all edits locally (the save file is never sent to any server). JavaScript must be enabled for it to work.

Links:
 * The editor web page.
 * The program's GitHub repository.
 * The official forum thread.

Features as of version 1.4.0:


 * Edit cycle count
 * Edit next duplicant spawn timer
 * Edit duplicant
 * Name
 * Gender
 * Voice
 * Appearance (base clothing, hair, eyes, mouth, head shape)
 * Scale (Tall and skinny! Tiny!  Fat!)
 * Health state (Alive, Dead, Invulnerable)
 * Skill levels and Experience
 * Job assignment, mastery, and experience
 * Job Interests
 * Add and remove Traits
 * Apply and remove status effects
 * Edit geysers
 * Geyser type (limited to predefined types)
 * "random factors" for geyser activity. Choose anywhere from min to max value allowed for that geyser:
 * Material emit rate
 * Active time
 * Idle time
 * Dormant time